Adaptive Fingerprint Sensor Area Control for Power and Coverage
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Solution Overview
Problem
Existing biometric authentication systems, particularly fingerprint sensor systems, face inefficiencies in power consumption and sensor area utilization, as they often maintain a static, larger sensor area regardless of the user's digit size or authentication needs, leading to unnecessary power waste and potential inaccuracies.
Innovation Solution
The system dynamically controls the active fingerprint sensor area based on criteria such as security level, digit size during enrollment and recent authentication attempts, and authentication success rates, adjusting the sensor area to match the specific requirements for enhanced security or efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a static, larger sensor area is maintained, then authentication coverage is sufficient, but power consumption increases unnecessarily
Solution Approach 1:
The patent applies dynamics by transitioning from a static sensor area configuration to a dynamic one that automatically adjusts based on user digit characteristics. The system measures digit size during enrollment and uses this information to determine the optimal active sensor area, allowing the sensor to adapt its active region rather than maintaining a fixed large area, thus reducing power consumption while ensuring adequate authentication coverage.
Solution Approach 2:
The patent changes the parameter of sensor area size from a fixed large value to a variable value determined by digit characteristics. During enrollment, the system measures physical parameters of the user's digit (such as surface area or dimensions) and uses these measurements to calculate and set the appropriate active sensor area, thereby optimizing the balance between coverage and power consumption.
2Reliability
If a larger sensor area is used, then authentication coverage is ensured, but sensor lifespan decreases due to increased power consumption
Solution Approach 1:
The system dynamically adjusts the active sensor area based on actual digit size requirements, preventing the sensor from operating at maximum capacity continuously. By measuring digit characteristics during enrollment and configuring the sensor accordingly, the system extends the operational lifespan of the sensor while maintaining adequate authentication coverage for all users.
Solution Approach 2:
The patent changes the operational parameters of the sensor by setting the active area size based on measured digit parameters. This parameter adjustment ensures the sensor operates efficiently without excessive power consumption, thereby prolonging its lifespan while still providing sufficient authentication coverage for various digit sizes.
3Device complexity
If a fixed sensor area is used, then device complexity is low, but adaptability to different digit sizes is insufficient
Solution Approach 1:
The patent applies preliminary action by measuring and recording digit characteristics during an initial enrollment process. The system measures parameters such as digit surface area or dimensions and stores this information for later use. During subsequent authentication, the system retrieves these pre-measured parameters to determine the appropriate sensor area, thereby achieving adaptability without adding complex real-time measurement capabilities.
Solution Approach 2:
The system enables self-service by automatically determining the optimal sensor area based on the user's own digit characteristics that were measured during enrollment. The user's digit properties are used to configure the sensor settings, allowing the system to adapt to individual users without requiring manual configuration or complex external measurement devices.
4Use of energy by moving object
If a smaller sensor area is activated, then power consumption is reduced, but authentication accuracy may be compromised
Solution Approach 1:
The patent changes the sensor area parameter based on measured digit parameters to optimize the balance between power consumption and authentication accuracy. By calculating the minimum required sensor area that still provides adequate coverage for the user's digit, the system ensures authentication accuracy is maintained while minimizing power consumption. This parameter optimization prevents both excessive power use and insufficient coverage.
Data Source
AI summary
Methods, devices and systems for controlling an active fingerprint sensor area of a fingerprint sensor system are disclosed. In some examples, the one or more active fingerprint sensor area criteria may involve, or correspond to, a security level. The security level may correspond to a data security level, a software application security level, or a combination thereof. According to some examples, controlling the active fingerprint sensor area may involve activating a relatively larger fingerprint sensor area for a relatively higher security level. Alternatively, or additionally, the one or more active fingerprint sensor area criteria may correspond to a fingerprint sensor area used for obtaining fingerprint sensor data from one or more digits involved in an enrollment process, the size of one or more digits used during the enrollment process, the size of one or more digits used for one or more recent authentication attempts, or combinations thereof.